Office Guard Email DLP by Mike Killian

Office Guard Email DLP scans what you're writing in Gmail, Outlook.com, and Yahoo Mail, and warns you before you send a message that may contain sensitive information — before it's too late to catch it.

WHAT IT CATCHES
Social Security numbers, credit card numbers, bank routing and account numbers, SWIFT/BIC codes, driver's license and passport numbers, dates of birth, bank names and addresses, and wire transfer instructions — flagged as a top priority, since wire fraud targeting real estate closings and other high-value transactions is one of the most costly and common email-based attacks today.

YOUR DATA NEVER LEAVES YOUR BROWSER
Every scan happens entirely on your own device. Nothing you type is ever sent to Office Guard, to any third party, or to any server anywhere. This isn't a policy promise — it's how the extension is built: there is no network request the scanning code could even make.

YOU'RE ALWAYS IN CONTROL
Every warning includes a clear “Send anyway” option. This extension never permanently blocks an email — it pauses to make sure a sensitive message is intentional, not a mistake, and then respects your decision either way.

SET YOUR OWN SENSITIVITY
Choose from three levels — Notify only, Balanced (recommended), or Strict — controlling how often you're asked to confirm versus just shown a quiet heads-up. Individually turn off any specific check that doesn't apply to how you use email.

BUILT FOR PROFESSIONALS WHO HANDLE SENSITIVE INFORMATION
Especially useful for real estate agents, attorneys, accountants, and anyone else who regularly emails financial or personal information — and who can't afford a single mistaken send.